A Study on the Bond Strength between High Performance Concrete and Reinforcing Bar

Eun Suk Choi, Jung Woo Lee, Seong Jun Kim, Jong Won Kwark

Korea Institute of Civil Engineering and Building Technology, Goyang, Republic of Korea.

DOI: 10.4236/eng.2015.77033                

Abstract

As a preliminary study for the erection of floating structures using high performance concrete, this paper examines the bond characteristics between concrete and the reinforcing bar. Since the floating structure is constructed in aquatic environment, corrosion of the reinforcing steel is likely to develop more prematurely than in onshore structure in case of concrete cracking. A solution to this corrosion problem could use FRP rebar instead of steel reinforcement. To that goal, an experimental study is conducted on the concrete-FRP bond strength to verify if such FRP rebar develops performance comparable to the conventional steel rebar. A series of tests are performed considering the bond length of ordinary steel rebar and G-FRP rebar as test variable with respect to the strength of concrete, and the results are presented.

Keywords

FRP Reinforcement, High Performance Concrete, Bond Strength, Concrete Strength, Bond Length

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	Korea Institute of Construction Technology (KICT) (2009) Design Specific Technology for Ultra High Performance Concrete. Report of 2nd Year of Super Bridge 2020, 135-155.
[2]	Habel, K. (2004) Structural Behaviour of Elements Combining Ultra-High Performance Fibre Reinforced Concrete (UHPFRC) and Reinforced Concrete. Doctoral Thesis No. 3036, EPFL Swiss Federal Institute of Technology, Lausanne.
[3]	Park, J.-H., Kim, J.-S. and Joh, C.-B. (2014) An Experimental on Bond Behavior of UHPC Using Pull-Out Test. Proceedings of the Korea Concrete Institute, 26, 543-544.
[4]	Holschemacher, K., Weiβe, D. and Klotz, S. (2004) Bond of Reinforcement in Ultra High Strength Concrete. Proceedings of the 2nd International Symposium in Ultra High Performance Concrete, Kassel, September 2004, 375-388.
[5]	RILEM (1970) Bond Test for Reinforcing Steel: 2. Pullout Test. Recommendation RC 6.